/**
 * 
 * @param {*} id 跳转的id 
 */ 
function skip(id) {   
    const idSel = document.querySelector('#'+id)
    if (idSel!=undefined) { 
        idSel.scrollIntoView({ behavior: "smooth" }); 
        if (id == "feedBack") {
            document.getElementById('leftNav').style.visibility = "hidden";            
        }
    } else {
        console.log('元素不存在');
    }
}